Trig - Ambiguous case?

In triangle ABC, a=8cm and angle A = 62 degrees. Find a value for b so that angle B has

a) two possible values
b) one possible value
c) no value

I drew this out and everything, but I don't really know what to do. All the other problems related to the ambiguous case allow you to use b sin A to solve for the height, so that you can compare the length of the side opposite the given angle to see how many triangles, if any, are possible. Tia!